There are countless ways to measure intelligence, but the one that most people are probably familiar with is the IQ test.

According to Brain Metrix, an IQ score between 90 and 110 is average, and anything above 120 is therefore considered above-average intelligence — often dubbed “superior.” Outside of that, a score below 70 might be a sign of a disability while 130 or higher is associated with giftedness.

That said, IQ scores are just one measure of cognitive ability, and not everyone agrees that they’re accurate. Fortunately, you don’t have to take one to find out if there’s a chance you’re a little brighter than average.

Scroll through to learn how to tell if you are smart, and which signs suggest that you might be a little smarter than most people.

1. You’re The Oldest Sibling

Whether we like it or not, birth order is something that shapes our lives.

The eldest siblings are known for being responsible and natural leaders.